Horseshoe-calk.



'No. 873,119. PATENTED DEC. 10, 1907.

V EIGOURTNEYK: P. BORNHORN.

HORSESHOE GALK.

APPLICATION IILED AUG. 5, 1907.

EDMUND COURTNEY AND PAUL BORNHORN, OF GOVINGTON, KENTUCKY.

HORSESI'IOE-CALK.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed August 5. 1907. Serial No. 387052,

T 0 all whom it may concern:

Be it known that we, EDMUND COURTNEY and PAUL BORNHORN, citizens of the United States of America, and residents of (lovington, county of Kenton, State of Kentucky, have invented certain new and useful Improvements in Horseshoe-Oalks, of which the following is a specification.

The object of our invention is a horse shoe calk which may be readily secured upon a horse shoe and firmly locked thereon so that it will not be loosened by the horses tramping upon hard, rough ground, and which is of a shape to give the most sup ort to the animal against slipping. This 0 ject is attained by the means described in the specification and illustrated in the drawings, in which,

Figure 1 is an inverted plan view of a horse shoe of ordinary construction, supplied with horse shoe calks embodying our invention. Fig. 2 is a detail view of the ridge or stud of .the calk and its integral lug of the form of calk which is secured to the heel of the shoe, the view being takenfrom the interior of the shoe. Fig. 3 is a View similar to Fig. 2, but showing the jaw, screw and lock-nut in place. Fig. 4 is a sectional view taken upon line a;9c of Fig. 1. Fig. 5 is' a detail perspective view of the inner jaw of the calk illustrated in Figs. 24. Fig. 6 is a view similar to Fig. 4 of the form of calk secured to the toe of the shoe. Fig. 7 is an end view of the calk secured to the toe, the View being taken from the interior of the shoe. Fig. 8 is an inverted plan view of a form ofcalk supplied with a rubber hob. Fig. 9 is a detail View of the lug and the hobs of the form illustrated in Fig. 8. Fig. 10 is an interior elevation of a modified form of plate and screw.

Referring to the heel calk illustrated in Figs. 1l: The ridge or stud, a, of the heel calk is formed integral with an upwardly projecting flat jaw, a, which terminates at its upper end in a detent, a which takes over the outer edge of the shoe, B'. The ridge or stud, a, has V-shaped ways, 0, a, formed upon its sides and has a central interiorly screw-threaded recess, a A jaw, C, to cooperate with the jaw, a, is formed from a flat plate having inwardly projecting arms, 0, c, to enter ways, a a, and a perforation, 0 to register with the recess, a A square headed screw, D, passes through the perforation, c", and engages the threads of the recess, a. Between the head of the screw and the jaw, C, a lock-nut, 0 is placed. l/Vhen itis desired to engage the calk with the shoe, the jaw, C, is separated from the jaw, a, a distance sufficient to pass the shoe, B, between the detents. Then the jaw, a, is placed so as to contact the outside of the shoe, B, the jaw, C, taking over the interior periphery of the shoe. Then the screw, D, is turned so as to carry the jaw, C, toward the j aw, a, the arms, 0, 0, moving along in the ways, a a. After the calk has been se cured in place, an extra turn is given to the screw so that the lock-nut, 0 will be jammed against the face of the jaw, C, to prevent accidental unlocking of the same. In this form it is noted that the arms fitting in the ways, (1 a and the screw taking into the central recess, hold the jaws in rigid fixed relation to each other so as to prevent any play therein which will keep the screw from working loose, an efiect which is heightened by the operation of the lock-nut The form illustrated in Figs. 6 and 7 is similar to that just described, with the eX- ception that the keel, a, is placed in a position parallel to the jaws, a, instead of being transverse thereto, as in the form shown and described in Figs. 2-4, and in place of having ways, a a, recesses a], a are made in the keel plate, into which the arms, 0 of the plate, 0, take.

In the form illustrated in Figs. 8 and 9, the outer jaw, a, is formed integral with a horizontal plate which has projections, a, a upon each side, to which rubber hobs, E, E, are secured by screws, e, e. The jaw, C, with its arms, 0, is the same as that illustrated in Figs. 6 and 7, the screw entering the central interior screw-threaded recess, a, and the arms entering recesses, a", a.

In the modification illustrated in Fig. 10, all the parts are the same as illustrated in Figs. 26, except that in the plate, G which corresponds to the plate, C, the central perforation, 0 is enlarged and the plate has upon one side a cutaway portion, 0, from which a bore extends inward to the perforation, 0 A spring, 0 is secured'at 0 to the plate and has a pin, 0 projecting in through the bore in the plate, C Screw, D, has formed upon it a collar adjacent to its head, in which are cut teeth, (I, which are engaged by the pin, a". When the screw is screwed into place in the recess, a the teeth being faced so that while the pin, c permits the rotation of the screw to pass it into the recess,- a the said pin prevents the reverse rotation of the screw, thus guarding against accidental loosening of the screw. When it is desired to remove the screw, it is necessary to hold the spring, 0 outward, so that the pin, a, is out of engagement with the teeth, d.

What we claim is:

1. In a horse shoe calk a plate carrying one or more studs for contacting the ground and a jaw for engaging one side of a shoe, the said plate having. transverse ways and a screw-threaded recess, in combination with a second aw having arms to engage the ways and a perforation to register with the recess and a screw for passing through the perforation in the second jaw into the recess in the plate.

2. In a horse shoe call: a plate carrying one or more studs for contacting the ground and a jaw for engaging one side of a shoe, the said plate having a screw-threaded recess,

in combination with a second jaw having a perforation to register with the recess, a screw to pass through the perforation in the second jaw and into the recess in the plate, ratchet teeth near the head of the screw and a pawl mounted upon the said plate for engaging the ratchet teeth to prevent the screws working loose.

3. A horse shoe calk consisting of a stud having formed integral with it a longitudinal; jaw adapted to engage the exterior rim of a shoe and having a central screw-threaded recess and transverse ways in combination the ways and a central perforation to register with the recess, and a screw for passing through the perforation and into the recess.

EDMUND COURTNEY. PAUL BORNHORN. Witnesses: WALTER F. MURRAY, AGNES MoOoRMAoK.

with a second jaw, having arms to engage H 

